Synergic effect of nanostructuring and excess Mn3+ content in the electrochemical performance of Li4Ti5O12–LiNi0.5Mn1.5O4 Li-ion full-cells

Haridas, Anulekha K. and Jyothirmayi, Adduru and Sharma, Chandra Shekhar and et al, . (2020) Synergic effect of nanostructuring and excess Mn3+ content in the electrochemical performance of Li4Ti5O12–LiNi0.5Mn1.5O4 Li-ion full-cells. Journal of Materials Research, 35 (1). pp. 42-50. ISSN 0884-2914

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Abstract

The design of high energy Li-ion batteries (LIBs) by coupling high voltage LiNi0.5Mn1.5O4 (LNMO) cathode and Li4Ti5O12 (LTO) anode ensures effective and safe energy-storage. LTO–LNMO full-cells (FCs) with difference in electrode grain sizes and presence of excess Mn3+ in cathode were studied using micron-sized commercial LTO, nanostructured LTO donuts (LTOd), P4332 LNMO nanopowders, and nanostructured Fd3m LNMO caterpillars (LNMOcplr). Among the studied FCs, LTOd–LNMOcplr was detected with a stable capacity of 69 mA h/g (1C rate), 99% coulombic efficiency, and 87% capacity retention under 200 cycles of continuous charge–discharge studies. The superior electrochemical performance observed in LTOd–LNMOcplr FC was due to the low charge transfer resistance, which is corroborated to the effect of grain sizes and the longer retention of Mn3+ in the electrodes. An effective and simple FC design incorporating both nanostructuring and in situ conductivity in electrode materials would aid in developing future high-performance LIBs.

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IITH Creators:

IITH Creators	ORCiD
Sharma, Chandra Shekhar	https://orcid.org/0000-0003-3821-1471

Item Type:

Article

Additional Information:

Authors acknowledge Nano Mission project provided by Department of Science and Technology (DST), India for the entire funding. TNR and AKH extend their sincere gratitude to Dr. B.V. Sarada of ARCI, Hyderabad for Micro Raman data.

Uncontrolled Keywords:

Anodes; Cathodes; Charge transfer; Electric discharges; Electrochemical electrodes; Energy storage; Grain size and shape; Lithium; Lithium compounds; Manganese compounds; Nanostructures; Nickel compounds; Titanium compounds

Subjects:

Chemical Engineering

Divisions:

Department of Chemical Engineering

Depositing User:

Team Library

Date Deposited:

16 Oct 2019 08:11

Last Modified:

21 Nov 2022 08:33

URI:

http://raiithold.iith.ac.in/id/eprint/6603